The presence in mice chronically treated with morphine of a substance (s) that modifies morphine responses.
D000698:Analgesia; D000818:Animals; D002855:Chromatography, Thin Layer; D003061:Codeine / Q000378:metabolism; D004361:Drug Tolerance; D005260:Female; D006801:Humans; D008297:Male; D051379:Mice; D009020:Morphine / Q000378:metabolism* / Q000494:pharmacology / Q000652:urine; D009269:Nalorphine / Q000378:metabolism / Q000494:pharmacology; D013375:Substance Withdrawal Syndrome / Q000187:drug effects*; D013997:Time Factors
D009020:Morphine; D009269:Nalorphine; D003061:Codeine